scholarly journals Tunnel Surrounding Rock Deformation Characteristics and Control in Deep Coal Mining

Geomaterials ◽  
2013 ◽  
Vol 03 (01) ◽  
pp. 24-27 ◽  
Author(s):  
Zhiqiang Zhao ◽  
Housheng Jia ◽  
Bo Peng ◽  
Yangyang Dong
Keyword(s):  
Coal Mining ◽  
Surrounding Rock ◽  
Rock Deformation ◽  
Deformation Characteristics ◽  
And Control ◽  
Surrounding Rock Deformation

scholarly journals STUDY ON INTENSIVE DESIGN AND CONTROL OF CHAMBER GROUP UNDER THE CONDITION OF WEAK SURROUNDING ROCK

Mining Scince ◽  
2019 ◽  
Vol 26 ◽  
Author(s):  
Jun Yang ◽  
Shilin Hou ◽  
Kaifang Zhou ◽  
Bowen Qiao ◽  
Hongyu Wang ◽  
...  
Keyword(s):  
Stability Control ◽  
Field Application ◽  
Surrounding Rock ◽  
Control Measures ◽  
Wire Mesh ◽  
Rock Deformation ◽  
Control Effect ◽  
Obvious Effect ◽  
And Control ◽  
Surrounding Rock Deformation

In order to study the design and stability control of deep soft rock chamber group, taking ninth coal mine of Hebi Coal Power Co., Ltd. as the engineering background, The main problem in normal design is analyzed with the combined method of FLAC3D numerical simulation and field engineering test. and then puts forward targeted control measures and carries out field application. The results show that, compared with the conventional design, the intensive design can reduce the stress concentration degree and plastic zone range of the surrounding rock, as well as reduce the quantities. Compared with conventional supporting schemes, the surrounding rock deformation greatly reduces by more than 82% after adopting bolting and shotcreting with wire mesh + anchor cable + floor anchor supporting. Among them, the floor heave control has obvious effect, and the decreasing amplitude reaches more than 93%. The field application shows that the surrounding rock deformation of the main chamber is within the allowable range, and the chamber control effect is good. Therefore, the research results can provide reference for the design and control of similar chamber groups.

Analysis of Surrounding Rock Deformation Based on M-C Model and Cvisc Model

2013 ◽  
Vol 295-298 ◽  
pp. 2963-2966
Author(s):  
You Xiang Li
Keyword(s):  
Surrounding Rock ◽  
Rock Deformation ◽  
Hydropower Station ◽  
Deformation Characteristics ◽  
Diversion Tunnel ◽  
Software Application ◽  
Jinping Ii Hydropower Station ◽  
Coulomb Model ◽  
Plastic Zones ◽  
Surrounding Rock Deformation

According to the analysis of the surrounding rock deformation of the buried sandy slate, which is 1500-2000m depth of Diversion Tunnel Jinping-II Hydropower Station, the essay uses FLAC software application to analyze the deformation characteristics and plastic zones of the sandy slate, study comparatively the influence of Mohr-Coulomb model and Cvisc model to the surrounding rock, and then draw some conclusions, including that calculations derived by using Cvisc model is more in line with the actual engineering.

Concrete Crack Control Technology in Chongqing Inch Container Terminal Box Letter of Application in Engineering

2012 ◽  
Vol 217-219 ◽  
pp. 161-164
Author(s):  
Ya Nan Fu ◽  
Ze Ping He
Keyword(s):  
Container Terminal ◽  
Steel Corrosion ◽  
Surrounding Rock ◽  
Rock Deformation ◽  
Control Technology ◽  
Crack Control ◽  
Concrete Crack ◽  
Box Culverts ◽  
And Control ◽  
Surrounding Rock Deformation

This paper mainly introduces the main causes of the concrete cracks, and with Chongqing inch beach bonded port freight container terminal, drain tank letter concrete crack control as the engineering example, the paper analyzes the method of crack control. For example reduce water consumption, choose the narrow fly ash cement, reduce the narrow concrete constraint, and control the hydration heat, strengthen the concrete curing, control the steel corrosion of crack, control the box by letter of the surrounding rock deformation, they can be reached that box culverts basic don't crack effect.

Analysis of Surrounding Rock Deformation Behavior and Supporting Measures in High-Level Strata Pressure Tunnel

2012 ◽  
Vol 170-173 ◽  
pp. 1629-1633
Author(s):  
Li Wu ◽  
Qing Jun Zuo ◽  
Li Shi ◽  
Zhong Le Lu
Keyword(s):  
Large Deformation ◽  
Deformation Behavior ◽  
Surrounding Rock ◽  
Rock Deformation ◽  
Deformation Characteristics ◽  
Geological Investigation ◽  
Pressure Tunnel ◽  
High Level ◽  
Surrounding Rock Deformation

According to geological investigation and monitoring results, this paper analyzed the reasons for large deformation in Baozhen Tunnel, discussed the deformation characteristics and presented the corresponding supporting measures.

The Numerical Simulation and Supporting Design of Gob-Side Entry Retaining in Gradient Medium Thick Coal Seam

2013 ◽  
Vol 368-370 ◽  
pp. 1812-1815 ◽  
Author(s):  
Yong Qin Zhang ◽  
Le Le Sun ◽  
Wei Zhong Zhang ◽  
Li Dan Cao
Keyword(s):  
Numerical Simulation ◽  
Coal Seam ◽  
Surrounding Rock ◽  
Rock Deformation ◽  
Deformation Characteristics ◽  
Thick Coal Seam ◽  
Geological Conditions ◽  
Immediate Roof ◽  
The Impact ◽  
Surrounding Rock Deformation

In order to solve the technical problem of gob-side entry retaining in inclined coal seam, combined with the practical mining conditions in a certain mine, this paper adopts the discrete element method, applies numerical simulation to analyze inclined coal seam gob-side entry retaining with three different supporting ways, and studies surrounding rock deformation characteristics of gob-side entry retaining. The research results show that the filling body upper boundary for right side can control the roadway surrounding rock deformation better compared with the boundary is used as the hypotenuse; Meanwhile, the pressure of surrounding rock of coal seam gob-side entry retaining is mainly from the impact of the immediate roof natural fall of the upper goaf tilt and the weight of caving coal gangue and coal seam of immediate roof above; According to the surrounding rock deformation characteristics of coal seam remain gateway along goaf, it is determined to use combined supporting method of concrete filling in roadway sides and anchor wire rope supporting inside the roadways, providing the design basis of gob-side entry retaining in coal seam for the similar geological conditions.

Surrounding Rock Deformation Properties and Control Technique for Roadway along Goaf in Soft Rock

2014 ◽  
Vol 1010-1012 ◽  
pp. 1482-1486 ◽  
Author(s):  
Ming Yang ◽  
Xin Zhu Hua ◽  
Deng Hong Chen
Keyword(s):  
Soft Rock ◽  
Surrounding Rock ◽  
Rock Deformation ◽  
Control Technique ◽  
Deformation Properties ◽  
Economical Benefit ◽  
Practical Engineering ◽  
Supporting Effect ◽  
And Control ◽  
Surrounding Rock Deformation

Deformation of roadway driving along goaf was very serious during mining in Qidong coal Mine.This paper took the roadway as the engineering background, firstly, numerical simulation of the roadway has been made by FLAC3D,then its surrounding rock deformation properties and stress distribution were analyzed,the reinforcement technology was proposed during mining, lastly, the deformation around roadway during mining was observed and analyzed. The practical engineering shows that : the combined supporting of bolting-shotcreting-grouting can effectively control the deformation around roadway, the supporting effect is good , and better social and economical benefit have been gotten.

scholarly journals Study on the Stage Failure Mechanism and Stability Control of Surrounding Rock of Repeated Mining Roadway

2020 ◽  
Vol 2020 ◽  
pp. 1-16 ◽  
Author(s):  
Xiangye Wu ◽  
Jingya Wang ◽  
Wencai Wang ◽  
Chen Tian ◽  
Qingwei Bu ◽  
...  
Keyword(s):  
Plastic Zone ◽  
Failure Mechanism ◽  
Coal Mining ◽  
Field Measurement ◽  
Surrounding Rock ◽  
Rock Deformation ◽  
Expansion Stage ◽  
Stress Environment ◽  
Surrounding Rock Deformation ◽  
Stable Stage

China is one of the leading countries in the mining and utilization of coal resources, and the problems of coal-mining technology and safety have been concerned by the world, while the serious deformation and destruction of surrounding rock and the difficulty of support have brought inconvenience to the mining of coal resources due to repeated mining. This paper takes the actual engineering 22205 mining roadway in Buertai mine as the research background, through the combination of numerical simulation and field measurement. In this paper, the stress environment, plastic zone, and surrounding rock deformation in the advancing process of coal-mining face are studied, and the stress evolution law of surrounding rock in repeated mining roadway is obtained. It is clarified that the surrounding rock deformation is the failure mechanism under the combined action of principal stress difference and stress direction deflection. As a result, the surrounding rock of the roadway is asymmetrically deformed and destroyed, and the corresponding surrounding rock control scheme is put forward. The results show that the influence of repeated mining on roadway stress environment can be divided into four stages with the mining process: the stability stage of mining influence, the expansion stage of primary mining, the stable stage after primary mining, and the expansion stage of second mining. At the same time, the shape changes of the plastic zone and the displacement monitoring results of the monitoring are analyzed, and the results are obtained; the stage of stress change is suitable, and combined with the failure characteristics of surrounding rock in each stage, it is put forward that reinforcement measures should be taken in the stable stage after mining; the specific reinforcement scheme is determined according to the expansion form of plastic zone and field measurement. The on-site monitoring shows that there is no roof fall accident during the use of the roadway, which ensures the safety in production.

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