倾斜煤层回采巷道的矿压显现特征及其锚杆支护研究

APPEARENCE OF STRATA PRESSURE OF GATEWAY IN INCLINED COAL SEAM AND BOLTING SUPPORTS

采用可充分变形的离散无法，对一个倾斜煤层回采巷道的稳定性进行了分析，并进行了围岩松动范围的测试。在此基础上，提出了锚杆加钢带的巷道综合支护方案。用离散无法及现场围岩位移测试对支护方案的合理性进行了评价。经施工验证，支护方案是成功可行的。根据分析和现场观测，提出了倾斜煤层回采巷道锚杆支护应注意的问题。

A typical gateway in inclined coal seam is analyzed using fully-deformablediscrete element method. The fractured zone around the gateway is monitored in field.Based on the measurement results and theoretical analysis, a comprehensive supportscheme with bolt and steel belt is proposed. Discrete element method is used to assess thebolting scheme, and displacement monitoring in field is also carried out. It is proved inpractice that the scheme is both successful and reasonable. According to theoreticalanalysis and monitoring in field, some important keys to gateway bolting are presented.