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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...
The working face of high mining have long length of mining and strike, so the area of goaf is large, often cause air return and local gas (especially the top corner) overrun, lead to the gas of working face overrun frequently and forced to shut down, even bring on significant pernicious accidents, cause casualties and great economic losses. This paper use the method of field testing and theoretical...
With the deep development of coal mining, the underground mining will face serious threats to the confined aquifer, mining under safe water pressure of aquifer has become the main way to mine deep coal resources. At the same time, the auxiliary waterproof method is particularly important to adapt to the mining. Faced with the mining technological challenges in the deep coal mining, with the analysis...
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...
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...
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...
Under the guide of green mining theory of coal resource and green logistics concept, green logistics is introduced into the green mining technology. Firstly this paper defines the concept and connotation of green mining logistics based on analysis of green mining technology and green logistics. Then gives the composition of green mining logistics according to coal flow and material flow underground...
The ventilation system is the basis to control the hazards in coal mine laneway. High reliability ventilation system can continuously convey fresh air into laneway , dilute the noxious gas, reduce disaster and ensure the mining productivity safe and effective. As we know that, many noxious gases in the coal mine laneway are compossible and their flowing states are complicated. In order to acquire...
In order to reduce dust concentration and prevent gas accumulation in the underground of coal mine, coal seam water infusion and gas drainage are fundamental measures. Present hole sealing methods are just for one purpose, which makes both too many holes quantities and waste of sealing materials. A new hole packer of center-through rubber self-expandable hole packer by water pressure was developed...
Based on analyzing the contents of safety early-warning system for the working face in mine and according to the production characteristic of coal mine in China, combining the analytical hierarchy process and neural network BP algorithm. The safety early-warning system for the working face in mine was also designed based on the combinatorial algorithm. The system was applied to estimate support capacity...
If the complicated system wants to be good running, it should have a stable initial condition. The function of checking hidden danger information system of the coal mine's production in the accident control becomes more and more important. Taking tunneling waking face, we established the checking hidden danger information flow by stages, based on systems' characteristics: Initial condition dependence,...
Dispatch and command center is the core sector of coal mine safety, production and management and its core functions is information processing and exchange. Through analysis the dispatching information flow and on the basis of positive feedback closed-loop management system theory, create a dispatching model by building PFS operating base, distinguish dispatching information feedback category, optimizing...
In this paper, theoretical analysis and practical of coal production were combined to study the mechanism of large gas explosion accident at coal face. The author uses coal spontaneous combustion theory, as well as rock pressure, gas flow field and gas explosion theory to study the cause of the large gas explosion with high incidence at coal face. Consequently, the cause of the accident is: when the...
Mine work face gas emission is the important basis for mine design, and has important practical significance for ventilation and safety production. Between mine gas emission and work face there are complex nonlinear relationships. The paper constructed a work face gas emission prediction model based on wavelet neural network. It based on statistics of a mine work face gas emission data, applied the...
Safety-production dispatching is a core of coal mine system. Traditional dispatching of coal mine is very rough and lack of theory guidance. Firstly, the paper studied the basic theory of Petri net and the principle of multilayer dispatching. According to the characteristic of coal mine safety-production, the paper gave the coal mine production dispatching model based on multilayer Petri net. In the...
A numeric simulation of gas migration in a fully mechanized coal caving stope based on Lattice Boltzmann Method is put forward. A mining stope includes an inlet air tunnel, a return air tunnel, a working face and a goaf. There are two different states of air movement in a stope: turbulent flow in the inlet air tunnel, the return air tunnel, the working face (the three parts are simplified as working...
Gas migrating in goaf and congregating in upper corner result in gas over limit in upper corner which greatly influences coal mining safety. To explore the cause of upper corner gas over limit and control it, this paper provides Lattice Boltzmann Method (LBM) simulation of gas migration and control in goaf of fully mechanized coal caving mining face. After analyzing the characteristics of goaf, a...
Reinforcement learning is an algorithm without model which is learning what to do--how to map situations to actions-so as to maximize a numerical reward signal. Reinforcement learning provides an available method to the systems, which are very difficult to build up accurate models around complex environment. But now many practical problems demand a maximum reward with not much cost (expense). For...
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