CAJ | 학술논문

根据国内某大型矿井的实际条件,采用数值模拟矿井开采条件,研究长壁工作面开采期间顺槽保护煤柱上锚杆的受力特征,研究结果显示:在工作面采动影响下巷道锚杆的锚固力变化较大,锚杆支护参数应和采动影响的剧烈程度相适应,防止锚杆预紧力过大或过小而造成矿压事故;锚杆支护力受其工作面采动影响较大,尤其是超前支撑压力的影响,在工作面采动前应对巷道进行加强支护;该矿工作面顺槽应提高顶板锚杆与锚索的预紧力以达到提高后期支护强度的目的;锚索由于具有长度大和承载力大的特点,其预紧力应大幅度提高.
근거국내모대형광정적실제조건,채용수치모의광정개채조건,연구장벽공작면개채기간순조보호매주상묘간적수력특정,연구결과현시:재공작면채동영향하항도묘간적묘고력변화교대,묘간지호삼수응화채동영향적극렬정도상괄응,방지묘간예긴력과대혹과소이조성광압사고;묘간지호력수기공작면채동영향교대,우기시초전지탱압력적영향,재공작면채동전응대항도진행가강지호;해광공작면순조응제고정판묘간여묘색적예긴력이체도제고후기지호강도적목적;묘색유우구유장도대화승재력대적특점,기예긴력응대폭도제고.
According to actual conditions of a large-scale mine, the paper was simulated mining conditions by using numeri-cal simulation of underground, and researched the force characteristics of protecting the coal block in period of long-wall mining. The study results showed that: changes of roadway anchoring force were rather changeable in condition of influence of mining. Bolting parameters should adapt mining influence in order to prevent accidents caused by too large or small rock pressure; bolting force was greatly influenced by its face mining move, especially ahead of the support pressure. Strengthening support should be taken before worker face; mine working face should be raised the roof bolt and cable preload in order to achieve the purpose of improving late support strength; pre-tightening force of anchor rope should be substantially raised due to features of large length and bearing capacity.