Determination of roof horizontal long drilling hole layout layer by dynamic porosity evolution law of coal and rock
Cheng Fan, Hao Xu, Gang Wang, Jianzhi Wang, Zhiyuan Liu, Cheng Qian
Topics & Concepts
DrillingBoreholeRoofPorosityPosition (finance)Coal miningCoalWork (physics)GeologyPetroleum engineeringDistribution lawEngineeringGeotechnical engineeringMechanical engineeringStructural engineeringFinanceEconomicsWaste managementCoal Properties and UtilizationRock Mechanics and ModelingGeoscience and Mining Technology