CAJ | 학술논문

为了揭示无烟煤储层降压排采过程中的解吸量、解吸率和解吸阶段，对采自沁水盆地晋城矿区寺河煤矿的3号无烟煤大块煤样在CH4压力2.5 MPa下吸附3 d，然后在2.0、1.5、1.0、0.7、0.5、0.3和0.1 MPa压力下连续进行7d的逐次带压解吸实验。结果表明，大块煤逐次降压解吸的解吸量是直接降压解吸的1.46倍；逐次压降各阶段累计解吸率与压力呈负指数关系，逐次降压至0.7、0.3 MPa时的累计解吸率分别为53.6%、75.2%；大块煤样逐次带压降压解吸阶段与煤储层实际排采的解吸阶段类似。研究成果对无烟煤储层递进降压设计具有一定的指导作用。
위료게시무연매저층강압배채과정중적해흡량、해흡솔화해흡계단，대채자심수분지진성광구사하매광적3호무연매대괴매양재CH4압력2.5 MPa하흡부3 d，연후재2.0、1.5、1.0、0.7、0.5、0.3화0.1 MPa압력하련속진행7d적축차대압해흡실험。결과표명，대괴매축차강압해흡적해흡량시직접강압해흡적1.46배；축차압강각계단루계해흡솔여압력정부지수관계，축차강압지0.7、0.3 MPa시적루계해흡솔분별위53.6%、75.2%；대괴매양축차대압강압해흡계단여매저층실제배채적해흡계단유사。연구성과대무연매저층체진강압설계구유일정적지도작용。
To reveal anthracite reservoir depressurization CBM drainage process desorption volume, rate and stages, taking No. 3 anthra?cite large coal samples from Sihe coalmine, Jincheng mining area, Qinshui Basin carried out adsorption under methane pressure 2.5MPa for 3 days, then carried out continuous successive depressurization desorption experiment under 2.0, 1.5, 1.0, 0.7, 0.5, 0.3 and 0.1MPa pressure for 7 days. The result has shown that the desorbed volume from block coal under successive depressurization is 1.46 times than from direct depressurization. Negative exponential relationship has been presented between cumulative desorption rate of successive depressurization stages and pressure. Cumulative desorption rates of successive depressurization to 0.7, 0.3MPa are 53.5%, 75.2%respectively. Large coal sample staged successive depressurization desorption is similar to actual CBM drainage stages. The re?search result has certain guiding significance to anthracite reservoir progressive decompression design.