【摘要】 全文对水力采煤的主要生产环节──水力落煤的技术问题全面进行了从理论到实践的论述和经验总结。着重对水射流破煤机理和煤层水力落煤方式；水力落煤工艺；决定水力落煤效率的主要因素；短壁无支护工作面水力落煤参数的确定；关于水力落煤几个关键问题等进行了专题论述。更多还原

【Abstract】 An all-round exposition of the technical aspects involved in coal extraction,and a related sum-up of experience are made on both theoretical and practical basis, with the emphasis placed on:mechanism of coal cutting with waterjet and seam hydraulicking modes; hydraulic coal winning process; main factors governing coal cutting efficiency; determination of hydraulic coal cutting parameters applied at shortwall and nonsupported coal face,and key factors involved.更多还原