【摘 要】
：
During mining or road-way development, the distribution of stress and coal pore pressure in the coal face and rib around the new opening will change, under certain conditions, dynamic failure of coal in the form of an outburst can occur. In the modeling s
【机 构】
：
College of Resource and Environment Engineering, Liaoning Technical University, Fuxin 123000, China;
论文部分内容阅读
During mining or road-way development, the distribution of stress and coal pore pressure in the coal face and rib around the new opening will change, under certain conditions, dynamic failure of coal in the form of an outburst can occur. In the modeling studies presented in this paper, an outburst was considered to consist of three distinct stages:preinitiation, initiation and post-initiation, which takes into account the major processes and mechanisms that can influence both outburst-proneness and post-initiation outburst behavior. The model has been applied to simulate the effects of mechanisms in the coal matrix, coal strength, coal damage, geological structures on outbursts. The model constructed using the FLAC software, which were undertaken to research the effects on outbursts of coal strength pressure gradient, and other factors.
其他文献
The arc erosion experiments on five kinds of silver-based contact materials, AgZnO (10), AgSnO2 (8.5) In2O3 (4), AgCdO (12), AgNi(10), AgWC(12)C(3) were carried out according to different breaking times, breaking currents, and making pressures. Then based
Since mining rights of coal resources(for short MRCR) could be regarded as amulti-stage compound real option, the evaluation for MRCR can be better solved using op-tion theory than the NPV. In the former research, we developed a two-factor model ofevaluat
The resource advantage of resourceful region has made the region devel op very fast. However because the resource is of exhausting character, this mean s that the region has hidden troubles of economic depression. The paper analyzes the formation of resou
The combustion characteristics of lignite blends were studied with a thermogravimetric analyzer (t.g.a.), at constant heating rate.The characteristic temperatures were determined from the burning profiles.It was found that the characteristic times of comb
The paper introduces a kind of full-length recoverable resin-metal bolts, expounds its structural principle and stress features, and gives some instances in laboratory tests and underground tests. The results show that full-length recoverable resin-metal
The deposit scale in the coal mine shaft usually causes serious accidents, such as making rope broken, cage seized or dropped. To solve this kind of problems, the research of the cutting scale mechanism was made, and a new type of removal scale equipment
Factors that influence enterprise resource planning(ERP) implementation in enterprises were described, and according to their interaction with each other, these factors were qualitatively processed by using interpretative structural model(ISM)method, and
On the basis of analysis of the present roofbolter\'s structures, the pneumatic vane motor roofbolter was proposed and researched. Structure principle of MFT-80Y type pneumatic vane motor roofbolter was expounded, a new project of the rotary shearing me
Analyzed the main problems which were found in current conditions and prob-lems of informationization in coal enterprises. It clarified how to achieve informationizationin coal mine and put forward a general configuration of informationization constructio
To enhance the technology and efficiency of strata injection is a problem to be solved urgently. Because of effected by the rough and poor production conditions of mining and the changeable bearing condition of strata, the technological process of injecti