Fault Coal And Rock Pillars Remain Reasonable Width Provided Numerical Simulation Analysis

In accordance with the relevant rules of order, a large fault fracture zone must remain secure waterproof coal pillar set reasonable length, resulting in a large number of coal resources can not be fully exploited. In recent years, with the fine aspects of geophysical prospecting level, aquifer grouting reinforcement technology has improved continuously, the original fault waterproof coal pillar design approach has been seriously questioned. To do this in a "people-oriented, technology-mine safety and efficiency and reduce the loss of resources, the path of sustainable development," social purpose and philosophy. For the liberation by the threat of flooding and coal resources of both common faults limit the impact of research in affected both under reasonable coal pillar leaving in its scale technique is very important.In this paper, five coal mine in a mining area of South Face 1011 outside of F14 fault for the study, from research and F14 fault fractal geometry features associated structure to start, based on the analysis of mine water inflow projection data on the use of downhole geophysical exploration and drilling more multi-discipline means cooperate with each other, linking theory with practice, combining pioneering mine roadway, roadway Shimen exposing a mining area and south outer 1011 Face drilling,transient electromagnetic detection results, focus on the exploitation of its own fault F14 containing water conductivity characteristics and Fractal geometry feature F14 fault rock, physical and mechanical properties, water rationality energy, water conductivity,water-rich, mining safety and reliability as well as the possibility of activating grouting transformation, and thus F14 faults and associated structures under the influence of mining damage movement and evolution law, guided analysis and forecasting of rich water, thereby proposed to be taken after the F14 fault on reasonable pillar mining of the theory is not removed Save program and limestone water disaster prevention countermeasures, Face entering fault waterproof pillar position effective control measures. On this basis, the need to focus on two-dimensional solid-liquid two-phase modeling experiment and use FLAC3D F14 fault for leaving in different coal pillar scale numerical simulation analysis, in-depth study of F14 fault that both stress and seepage fields at the same time mechanism occur under the influence of water inrush in coal mining process can be visible fault activation water inrush observation process, and reveals the mechanism of five coal mine mining segment in 1011 Face of F14 faultreasonable fault waterproof pillar leaving in a safe and feasible and conditions effective to obtain a theoretical conclusions; the fault rational coal pillar leaving in efficient recovery of resources to provide safe and reliable scientific evidence.The results showed that: when the coal seam near the fault, that fault zone "barrier" effect, floor water burst will be increased sharply. With Face steadily,increasing the height of floor damage, increasing the degree of fault activation, confined water along the fault activation guide lift height increasing; through this trial showed that: the safety of the prototype coal pillar width must be set to stay 40 m. Application of Fracture Zone FLAC3D different widths simulated, the study found that coal mining causes of the impact and extent of the fault fracture zone gradually becomes difficult to control; water inrush danger gradually become larger, so leaving in coal pillar width accordingly becomes large.