TY - Jour A2 - Criado,Maríaau - 陈,东东Au - j,春威Au - 谢,神格荣奥 - 王,恩·何国,Fulian Au - Cheng,Qiong Au - Zhang,Qiong Au - Zhang,清Py - 2020年 - 2020年/06/22 TI - 强煤和软屋巷周围岩石偏离灭绝的应力演进法律和控制在激烈的采矿条件下SP - 5036092 VL - 2020 AB - 针对大变形和不稳定故障问题及软煤的控制强烈采矿,实验室实验,理论计算,FLAC下的软屋顶巷道3d考虑到巷道屋顶和煤炭应变软化特性,研究了数值模拟,钻孔池和压力观察研究了气体后挡板的脱模应力和塑料区的分布和故障特性。然后提出了桁架锚索控制技术。结果表明以下:(1)对工作面的强烈采矿影响将偏转气体后挡板的周围岩石的峰值偏差应力区(PDSZ)。PDSZ的影响距离预先约20米,滞后60米;巷道的GOB侧的PDSZ位于煤柱表面的3-5.5米的范围内,而煤壁侧主要位于肩部角落和底角的3-4.5米范围内固体煤。(2)工作面中的激烈采矿导致气体后挡板周围岩石塑料面积的非均匀膨胀。巷道的两个肩部和煤柱的底部具有最大的损伤范围,最大损坏位置是煤柱(5米)的侧角。煤柱的角度和底角是支持控制的关键点。(3)气体后挡板的周围岩石的塑料失效线始终在PDSZ的内部和外部轮廓之间,PDSZ中的岩石质量处于稳定和不稳定的过渡状态,因此锚固件电缆支撑范围应该是交叉塑料失效线。 (4) The theoretical calculations and numerical simulation results agree well with the drilling peep results. Based on the deflection law of the PDSZ and the expansion characteristics of the plastic zone, a truss anchor cable supporting system with integrated locking and large-scale support function is proposed to jointly control the roof and the two sides, which effectively solves the problem of weak surrounding rock roadway under severe mining deformation control problems realizing safety and efficient production in coal mines under intense mining. SN - 1687-8434 UR - https://doi.org/10.1155/2020/5036092 DO - 10.1155/2020/5036092 JF - Advances in Materials Science and Engineering PB - Hindawi KW - ER -