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Coal mining is restricted by various mine geological disaster, and the largest mine safety issues are the water-inrush accidents. The precondition of Coal mine safety and production is ensuring the safety of coal floor. Usually coal floor is composed by different rock, it cannot be directly applied for mechanics model to analyze and calculate. In this article different formation stratum are reduced...
Based on the long-term field observation, it is to analyze the coal wall collapsing and saplling mechanics of the high cutting coal mining face, and put forth that existence of the weaken spot or face on the coal wall is the basic reason which cause the coal wall collapsing and saplling of the high cutting coal mining face. According to the coal wall collapsing and saplling characteristic, establishing...
Through analysis on domestic flat pitch seam Cross-cut exposing prominent anti-Outburst Coal technology, in connection with Cross-cut coal and Gas outburst law, take flowing deformation assumption as theology mechanism principle, study up on the effect of coal seam crosscut obligate rock pillar's resistance to the prominent, the way of Gas drainage, the form of coal seam Cross-cut pilot tunnels' and...
A FLAC-3D fluid-solid numerical simulation was performed to analyze the stability and anti-water ability of the waterproof gate. Analysis indicates that under water pressure 10.3MPa, the structure of underground chamber of waterproof gate and surrounding rock mass are under plastic state partially, but are basically stable and usable. In case of water filling in the tunnel, water seepage amount is...
At present, bolt-cable combined support system is still common in shallow roadway, and the design process of bolt-cable combined support system include four steps: initial design, implement design, pressure observation and modification of initial design. For modification of initial design, the rationality of support can be obtained from pressure observation that gives the prediction of deformation...
The incidence of dynamic rock disasters is closely related to the distribution of stress in the surrounding rock. For the safety requirement of the construction and the operation of underground caverns, the stress of surrounding rock is monitored to evaluate the stability of underground caverns. The construction of spillway tunnel in Wawushan project was taken as our research object. We studied the...
With the deep mining development of coal resource, many safety problems have arisen and become serious gradually, such as tunnel deformation, rock burst, and so on. Multi-source techniques and methods must be used to monitor and study the behave laws of tunnel pressure, thus safety and efficient mining can be guaranteed. It takes the working face No. VI 15-22020 and its transportation tunnel of 2nd...
Safety is an element of extreme priority in mining operations, currently many traditional mining countries are investing in the implementation of wireless sensors capable of reducing the number of accidents; through early warning signs to prevent injuries, dead and significant economic losses. The application of sensors capable of measuring in real time variables of interest, promises to be of great...
According to the statistics, roof and side fall accidents often occur and jeopardize greatly in coal mines. The variation of the strain and stress in the surrounding rocks of the mine roadway can predict the accident. How to obtain the strain and stress is the key point of the prediction. This paper provides a method on the case. Firstly the principle of monitoring stress in surrounding rocks of mine...
A new type of monorail hanging technology was invented to solve the auxiliary transportation problem in soft rock or coal bed roadway, and clearly introduced the hanging scheme and making a feasibility analysis. This new type of monorail hanging technology makes the monorail application in soft rock or coal bed roadway to be possible, solves a major problem in mine auxiliary transportation mechanization...
At the present stage of development of Kuzbass coal-mining industry the tasks of coal production increase and coal-mining safety increase are of top priority. Use of polymer materials is one of the directions of efficiency and safety increase of coal-mining works. The positive experience of polymer materials use at the coal-mines of Kuzbass proved the importance of polymer technologies in solution...
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