王家沟煤矿条带充填开采导水裂隙发育规律研究

doi:10.11799/ce201505028

Abstract

Abstract: In order to explore a water preserved mining method for Wangjiagou coal mine under the Salawusu FM of Yushen mining area in Northern Shaanxi, taking the geological and mining conditions of the fully-mechanized face 1301 and 1302 as background, basing on the principle of interaction between filling strip and key stratum, using both similar and numerical simulation, a comparative research on law of water flowing fracture development respectively resulting from caving method and strip-filling method is conducted. The results show that, the maximum height of water flowing fractured zone of caving face 1301 is about 110.4m, while that of strip-filling face1302 is about 55.4m. With the periodic failure and instability of immediate roof and main roof as well as the key stratum, water flowing fracture intermittently develops upward at varying velocity. The filling strips support the key stratum and coordinate to its flexural subsidence, effectively control the height of water flowing fractured zone, and thus the purpose of water preserved mining under aquifer of Wangjiagou coal mine is finally achieved.

Key words: strip-filling, water flowing fracture, water preserved mining, similar simulation, numerical simulation

CLC Number:

TD823

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Research on law of water flowing fracture development due to strip-filling mining of Wangjiagou coal mine

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