集贤煤矿切顶留巷关键参数及留巷稳定性分析OA北大核心CSTPCD
Key parameters and stability analysis of roof cutting and roadway retaining in Jixian Coal Mine
针对双鸭山集贤煤矿东二采区 16#右三工作面切顶留巷难题,建立了切顶留巷围岩力学模型,给出了切顶高度、切顶角度等关键参数理论计算式;分析了切顶参数(切顶高度、切顶角度)对留巷围岩应力分布及变形特征影响规律.模拟结果表明:切顶高度越大,卸压效果越好;切顶角度增大,实体煤侧应力呈现增大趋势,同时也为矸石垮落创造一定条件.相似模拟结果表明:当煤层开采至一定距离时,采空区上位岩层同期垮落,切缝范围岩体和垮落岩体形成铰接,即巷旁充填基本完成,留巷上方形成"…查看全部>>
Aiming at the problem of cutting roof and retaining roadway on the right third working face of 16#,east second mining area of Jixian Coal Mine in Shuangyashan city,the mechanical model of surrounding rock of cutting roof and retaining roadway is established,and the theoretical calculation formula of key parameters such as cutting height and cutting angle is given;the influence of roof cutting parameters(roof cutting height and angle)on the stress distributio…查看全部>>
孟显伟;曲泉;李子波;张强
嫩江市坤源矿业有限公司,黑龙江 嫩江 161400黑龙江省第五地质勘查院,黑龙江 哈尔滨 150096黑龙江科技大学 矿业工程学院,黑龙江 哈尔滨 150022嫩江市坤源矿业有限公司,黑龙江 嫩江 161400
矿山工程
无煤柱开采切顶卸压沿空留巷切顶高度切顶角度
mining without coal pillarroof cutting and pressure reliefgob-side entry retainingroof cutting heightroof cutting angle
《煤矿安全》 2024 (6)
160-168,9
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