用T621A石墨炭源合成出高强度金刚石

介绍了合成高强度(22．5kg～25．8kg)粗颗粒(40／50～25／30)单晶金刚石所需的炭源材料，触媒合金种类、装填方式、合成参数与合成效果。讨论了原料、合成工艺条件对生长高强度粗颗粒的优质金刚石的影响及合成机理。     

稠油污水的有机组成及可生化性研究

采用物化-厌氧-好氧法处理稠油污水,对物化生化处理各阶段出水的有机组分进行定性分析,并对稠油污水的可生化性进行了进一步研究。研究结果表明:不同处理工序出水的有机成分差异较大,经过气浮、厌氧处理后,稠油污水可生化性逐步提高,有利后续好氧生物处理。     

Mechanism and control technology of strong ground pressure behaviour induced by high-position hard roofs in extra-thick coal seam miningOA

This work aimed at revealing the mechanism of strong ground pressure behaviour(SGPB) induced by high-position hard roof(HHR). Based on the supporting structures model of HHR, a modified voussoir beam mechanical model for HHR was established by considering the gangue support coefficient, through which the modified expressions of limit breaking span and breaking energy of HHR were deduced.Combined with the relationship between the dynamic-static loading stress of supporting body(hydraulic support ...     

Influence of backfilling rate on the stability of the “backfilling body-immediate roof” cooperative bearing structure

To reduce the cost of backfilling coal mining and utilize the underground space of coal mines, a new backfilling mining method with low backfilling rate called constructional backfilling coal mining (CBCM) is proposed. The “backfilling body-immediate roof” cooperative bearing structure of CBCM is analyzed by establishing the model of the medium thick plate on an elastic foundation. The influence of the backfilling rate on the stability of overlying strata is analyzed by the numerical simulation experiment. The control effect of CBCM is verified by a physic similar simulation test. The economic benefit of CBCM is analyzed. The conclusions are: the deformation characteristics of the immediate roof and critical backfilling spacing in CBCM can be analyzed based on the Hu Haichang’s theory. Exerting the bearing capacity of the immediate roof is beneficial to the stability of the overlying strata. The CBCM has a good control effect on the overburden in Xinyang Mine when the backfilling rate is lower than 25%. The backfilling cost of per ton coal is 37.39 yuan/t when the backfilling rate is 13.7%, with a decrease rate of 56.63% than the full-filling. The research results can provide theoretical support for the application of CBCM in coal mining.     

Hydride Vapor Phase Epitaxy of GaN Thick Films by the Consecutive Deposition Process Using GaCl3

GaN buffer and main layers were grown by the conventional hydride vapor phase epitaxy technique using GaCl₃ consecutively. The deposited buffer layers were investigated by atomic force microscopy and X-ray analysis. To examine the behavior of the buffer layers at main layer growth temperature, heat treatment was conducted at 900°C. Based on the results of the buffer layer study, GaN thick films were grown at 1050°C. Optimum deposition conditions of buffer layer from the buffer and main layer studies generally coincided. On the φ scanning pattern, the GaN films grown on (0001) Al₂O₃ were single-crystalline. Band-edge emission dominated photoluminescence was observed at room temperature.     

LW-601喷水织机长丝织物松紧档疵点的成因及对策

松紧档疵点是喷水织机长丝织物织造过程中常见病疵之一。通过分析LW -60 1喷水织机的送经和卷取装置的工作原理 ,从机械调整与维护、生产过程管理及工艺优化等方面探讨了其产生的原因 ,并针对性提出了实用对策     

新上海一号煤矿含水层水化学特征

通过分析矿井充水水源水质特征,为判别突水水源提供理论依据,本文对新上海一号煤矿的各水层水的化学特征进行了系统分析,并将分析结果和Piper图进行了比较,总结了各含水层水的化学特征,为今后矿井水的防治提供了支持。     

拉梅（Lame）方程组的一个实用解—简支矩形厚板、多层厚板的静力弯曲、振动和热应力

本文用泊松（Poisson)-柯西（Csuchy)法，藉助标准基本函数，求得了拉梅（Lame)方程组的一个实用解－传播矩阵解，用它来分析简支矩形厚板、多层厚板的静力弯曲、振动和热应力问题特别方便。     

川东北碳酸盐岩层地层压力预测方法

准确预测碳酸盐岩层地层压力的难度较大,给钻井设计和施工造成不利的影响。针对碳酸盐岩层异常压力成因复杂和不符合压实规律的特征,利用纵波波速与地层物性参数之间关系的综合参数模型,借助川东北普光地区碳酸盐岩层的测井数据,使用逐步回归和多元非线性回归相结合的方法,来预测碳酸盐岩层的地层压力。结果表明,地层压力预测平均误差小于10%,精度满足工程需要。因此,综合参数模型可用于碳酸盐岩层地层压力的预测。     

利用贡献率分析法研究河道型水库两岸滑坡发育规律

通过实地调查发现金沙江向家坝段大多数滑坡发育于坝址-新市镇侏罗系地层,且为顺层滑坡,顺层滑坡在水库蓄水后容易复活且顺层岸坡在水库蓄水后容易发生新的滑坡.通过实地调查并借助勘察资料建立该段滑坡数据库,研究坝址-新市镇段不同岩层倾角、不同岸坡结构类型、不同河流弯曲类型对滑坡发育的影响,并且定量统计这3种因数的各种类型分别对滑坡的贡献率.结果表明:层面倾角为10°～ 19°的岸坡,对滑坡贡献率最高,层面倾角为30°～34°的岸坡对滑坡贡献率最低;缓倾外顺向层状岸坡对滑坡贡献率最高,中倾外顺向层状岸坡对滑坡贡献率最低;河流的凹岸对滑坡贡献率最高,凸岸贡献率最低.所得研究结果与实际情况较为吻合,为水库岸坡危险评价提供量化标准,同时为库区以后的规划建设提供选址依据.