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Drilling roadway layout method for top-coal caving mining in high-stress outburst thick coal seam

A technology of roadway layout and thick coal seam, applied in tunnels, mining equipment, earthwork drilling, etc., can solve the problems of gas outburst, high labor intensity and high investment, and achieve the effect of promoting development and improving production efficiency

Active Publication Date: 2016-10-26
CHINA UNIV OF MINING & TECH (BEIJING) +1
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  • Application Information

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Problems solved by technology

However, the Dashucun Mine adopts U-shaped steel arch support during the excavation process, and the investment in the construction process is relatively high. The roadway support is not easy to transport, erect and recover.
[0004] During the excavation process of the roadway, due to the soft coal quality, serious gas outburst, and the development of joints and fissures, under the influence of high stress geological conditions, the construction is difficult and the labor intensity is high. The phenomenon of wide sides and high roofs often occurs, and U-shaped steel support is relatively difficult. Poor roadway stability, in soft rock roadway, support components and connectors are seriously damaged
U-steel support is used. This support form is a passive support form, which cannot fundamentally solve the phenomenon of empty roof and empty side walls caused by coal flow in the top side. Under the action of high ground stress, the support deformation is serious, and the support effect is poor, resulting in repeatability. construction, which seriously affects the safety of personnel, and has a great impact on the mining of the working face and the succession of the mining area

Method used

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  • Drilling roadway layout method for top-coal caving mining in high-stress outburst thick coal seam

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specific Embodiment approach

[0011] The method for arranging the roadway when the top coal caving is mined in the high-stress soft protruding thick coal seam of the present invention, its preferred specific implementation mode is:

[0012] The roadway excavation adopts excavation along the top, and uses anchor net cable support.

[0013] During the process of tunneling along the top, temporary support of U-steel and anchor-mesh cable is used for temporary support. After the coal extraction operation is completed, the entire tunnel along the top is permanently supported by anchor-mesh cable.

[0014] During the excavation along the top, a fully mechanized excavator is used for excavation, and belt conveyors and scraper conveyors are used for coal discharge and transportation equipment.

[0015] The air supply of the excavation working face adopts local fans and press-in ventilation methods.

[0016] The anchor net cable support includes the roof anchor net cable support and the roadway two sides anchor ne...

specific Embodiment

[0026] Such as figure 1 As shown, according to the prediction of gas emission during the excavation process and the force analysis of the roadway, it is determined that the optimal excavation layout is excavation along the roof. The tunneling process along the top adopts traditional geological methods, combined with the basic geological structure data and geological sketch data information in the study area, to study and analyze the fault trend under complex geological conditions. At the same time, for key suspect areas, it is necessary to adopt advanced geological drilling technology to achieve reasonable control of various possible safety problems during the tunneling process along the top. On this basis, during the tunneling operation of the coal roadway, it is necessary to carry out the detection of the top and bottom coal at an interval of 5m to 10m, combined with the reasonable monitoring of the thickness of the coal seam at the roof and floor positions, to predict the f...

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Abstract

The invention discloses an excavation roadway distribution method of high-stress extrusion high seam caving coal mining. A top-following excavation method and an anchor net cable retaining and supporting method are adopted. The high gas extrusion seam caving problems that coal quality is limp, outburst of gas is serious, joint fissures develop, influence of high-stress geological conditions is caused, construction is difficult, labor intensity is high, and stability of a roadway is poor are resolved, production efficiency is greatly improved, and development of a coal mine is enhanced.

Description

technical field [0001] The invention relates to a mine safety mining technology, in particular to a tunneling roadway layout method during top-coal caving mining in high-stress outburst thick coal seams. Background technique [0002] Safe, fast and efficient tunneling is a prerequisite for coal mine production and a necessary condition for ensuring the normal connection of mine excavation. The excavation of the original roadway in the coal seam of Dashucun Mine of Fengfeng Group is mainly based on one-time full-height mining with U-steel support. This kind of excavation method is difficult to construct under high-stress geological conditions, and the labor intensity is high. The roadway construction will soon show serious deformation and convergence. , the coal mining efficiency and coal recovery rate are low, and the safety is also poor, and there are large and small faults with different heights and different long and short folds during the excavation, which seriously affe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/14
Inventor 聂百胜王殿录张步勤陈福印李祥春孟筠青
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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