Unconventional gas is a natural resource found trapped in coal beds, shale blocks, and tight sands. These gas resources are different from conventional energy in terms of reservoirs, geographical areas, and accumulations of natural gas. Different techniques are applied to extract unconventional gas depending on the field and type of gas to be extracted. A common method is hydraulic fracturing, where a hole is drilled into the rock and large amounts of water are injected at high pressure along with sand and other chemicals to create cracks in the rock. The cracks, when opened, will free the trapped gas allowing it to flow to the wellhead. The three types of unconventional gases are listed in the exhibit below.

Geologically, antimony is found in the form of ore and appears as a lustrous tin-white metal. The metal in the form of antimony trioxide is used in the production of flame retardants, lead batteries, and ceramics and as a catalyst and an alloy strengthening agent. China has the largest antimony ore reserves in the world and was a major supplier of the metal to the Global Antimony market. However, the classification of antimony as a strategic and rare earth metal in 2009 and the crackdown on its illegal mining by the Chinese government resulted in worldwide supply constraints.

Mining equipment is used to extract various natural resources from the earth. Mining equipment uses its mechanical energy for moving rocks or heavy surfaces and drills holes in the earth's surface. Transportation equipment, excavation equipment, and screening and washing equipment are some of the types of equipment used to extract a variety of minerals in the Mining industry.

Mining dozers remove unwanted materials such as loose earth, soil, and other related particles from the site, which might create an obstruction in the mining process. The bucket attached to the dozers helps dig holes in strategically designated locations. Their firm ground hold makes the dozers a useful piece of equipment in marshy, rough, and rugged terrains.

通过现场调研、矿物组分分析和层状顶板力学模型计算，得到６个煤岩互层巷道失稳因素．对６种因素各取３个水平进行正交模拟试验，得到了各影响因素之间敏感性排序．结果表明：通过水对煤岩互层弱化程度是造成顶板表面、深部位移、高帮顶板下沉量以及两帮移近量变化大的最敏感因素，同时煤岩互层次数，煤岩互层单层厚度对３种下沉量造成了不同程度的影响；而巷道宽度、断面形状是造成两帮移近量的重要敏感因素．研究结果通过线性回归方程进行验证，与正交试验结果基本一致，并且提出了该地区煤岩互层顶板巷道失稳控制对策．

将红砂岩试样在清水中浸泡，测量不同时间点红砂岩的吸水量，运用Ｌ型施密特锤测试干燥和各时间点红砂岩表面的施密特硬度，最终测试各试样在崩解初或饱水状态下的抗压强度．分析红砂岩的吸水速率、吸水率随吸水时间的变化趋势，红砂岩表面施密特硬度与吸水时间和吸水率的关系，施密特硬度与抗压强度之间的关系，结果表明：红砂岩在第１ｈ内的吸水量较大，吸水速率随吸水时间延长而下降；红砂岩的施密特硬度随吸水时间和吸水率的增加而降低，当达到饱和吸水率后，随浸水时间延长，施密特硬度继续降低；通过施密特硬度估计的红砂岩抗压强度值比实测值稍微偏大，但能够判断出红砂岩抗压强度的大致范围；施密特硬度与抗压强度之间的关系可以用数学公式表示．

采用ＸＲＤ、原矿化学多项分析、镜下鉴定及扫描电镜等对广西金龙铝土矿的物质组成、化学成分、晶体化学和嵌布特征进行了系统研究．结果表明：矿石以一水硬铝石为主（３６．５％），含三水铝石、黏土矿物、赤铁矿等；Ａｌ２Ｏ３平均品位约４４％，铝硅比均值约３．５７，属于低品位铝土矿石；一水硬铝石属斜方晶系双锥体类，在矿石中嵌布主要呈自形和半自形晶、豆状和鲕状、隐晶质和微晶集合体３种形式，与高岭石、叶腊石等嵌布伴生；高岭石属三斜晶系的层状结构硅酸盐矿物，多以隐晶质致密状或土状集合体形式嵌布；叶腊石属单斜晶系的二八面体结构含水铝硅酸盐矿物，以隐晶质细小鲕片状集合体形式嵌布，伴有赤铁矿、金红石等．