矿井地质条件分类指标初探

本文通过对矿井地质条件分类指标进行探讨 ,提出“同采地质块段”作为矿井地质条件分类的唯一指标 。

关闭煤矿的资源开发利用与地质保障

在关闭煤矿中除煤炭剩余外,还赋存丰富的煤层气、矿井水、地下空间、地热等资源,具有巨大的二次开发潜力。依据全国煤层气、矿井水、地热等资源赋存现状,梳理部分重点关闭煤矿资源的绿色开发与清洁高效利用发展趋势;通过系统介绍集钻探、物探、遥感、计算机等勘查技术于一体的综合勘探体系,总结了其在关闭煤矿资源有效开发利用的地质保障作用,并从资源、环境、技术体系及数据库等七个方面提出关闭煤矿资源开发利用地质保障工作建议。

矿井综采工作面末采安全技术研究

矿井综采工作面末采安全技术在矿井安全中占据重要地位。因此,在打眼时的安全技术措施、铺网时的安全技术措施、连网及挑梁安全技术措施、其他安全措施几方面提出有效建议。

Catalytic reduction of NO_x by CO on hydro-talcites-derived mixed oxides Co AIM and MgAlM (M = Cr, Mn, Fe, Co, Ni, Cu)

Two series of mixed oxides, CoAlM and MgAlM (M= Cr, Mn, Fe, Co, Ni, Cu) , were prepared by calcining their corresponding hydrotalcite-like compounds (HTLc) . The ratio of Mg: Al: M (or Co: Al: M) was 3:1:1. The catalytic activity of all samples for the reaction of NO + CO was investigated. The results showed that the activity of CoAlM was much higher than that of MgAlM. The structure and the property of redox were characterized by XRD and H2-TPR. The results indicated that only MgO phase was observed after calcining MgAlM hydrotalcites, and the transition metals became more stable. The spinel-like phase appeared in all of CoAlM samples after the calcination, and the transition metals were changed to be more active, and easily reduced . The activities of three series of mixed oxides CoAlCu obtained from different preparation methods, different ratio of Co:Al:Cu and at different calcination temperatures, were studied in detail for proposing the mechanism of reaction. The ability of adsorption of NO and CO were investigated respectively for supporting the mecha-