靖安煤矿石门支护及过煤层技术

摘要

It is concluded that the downcast cross -cut support forms are anchor net and anchor cable by analyzing the property and physical mechanical characteristics of surrounding rock in the return airway’s crosscut of Jing’an coal mine.Based on the surrounding rock loose circle theory,the supporting parameters of downcast crosscut is determined.Using this technology to control the supporting of Jing’an coal mine downcast crosscut, the results show that the forms of anchor net and anchor cable used in Jing’an coal mine downcast crosscut can not only effectively control deformation of roadway surrounding rock,maintain the stability of the roadway surrounding rock,but also obtain good economic benefits,compared with the previous shaped shed support,in the 180 m long roadway support,and the cost of raw materials has saved 80 000 yuan.As a result,the forms of anchor net and anchor cable are good,low consumables support forms,they can be applied in the crosscut Jing’ an coal mine supporting widely,which provides a reference for other coal mines in similar geological conditions.%通过分析靖安煤矿风井回风石门围岩的岩性及其物理力学特征，得出风井回风石门的支护形式为锚网梁＋锚索支护，基于围岩松动圈理论，确定了风井回风石门支护参数。运用这一技术对靖安煤矿风井回风石门进行支护控制，其结果表明：锚网梁＋锚索支护形式运用在靖安煤矿风井回风石门中，不仅能够有效地控制巷道围岩变形，保持巷道围岩的稳定性；而且能取得很好的经济效益，相比以往的工字钢架棚支护，在180 m 长的巷道支护中，仅材料费一项就节省了8万元。因此，锚网梁＋锚索支护是一种支护效果好、耗材低的支护形式，可在靖安煤矿石门支护中推广应用，为其他煤矿类似地质条件下的石门支护提供参考。