China University of Mining and Technology (CUMT)

Shanghai Zhaoxin Semiconductor Co., Ltd.

China Shenhua Energy Company Limited

Jiangsu Vocational Institute of Architectural Technology

Chn Energy Investment Group Co., Ltd

State Energy Investment Group Co. Ltd

Quansheng Li

Liu Han

Shuzhao Chen

Zhiguo Cao

Dazhao Gu

Cangyan Xiao

Sushe Chen

Jinfeng Ju

Jialin Xu

A memory device and an operation method for the memory device are provided. The memory device includes a memory block, a row decoder and a control circuit. The memory block includes a plurality of memory cells, wherein a row of memory cells in the memory block are coupled to at least one word line, and a column of memory cells in the memory block are coupled to a bit line and a multiplexer. The row decoder is coupled to the memory block and configured for the row of memory cells. The control circuit is coupled to the row decoder and indicates which word line, bit line and multiplexer is enabled.

Memory device and operation method thereof

A method for constructing a dam inside a dump of an inner-dump strip mine includes: taking an upper surface connection line of a primary water-resisting layer as upper filling reference datum boundary of an artificial water-resisting layer; arranging a dam foundation pit and a trapezoidal abutment on a midline of the dam foundation pit; building and reinforcing a step-shaped retaining dam core wall on the artificial water-resisting layer; laying a foundation impervious layer, waterproof geotextile, and an earth blanket on one side, close to the primary aquifer, of the retaining dam core wall; strengthening advance of a dumping working face on one side, away from the primary aquifer, of the retaining dam core wall, and dumping overburden of a strip mine to form a support; filling a space between the earth blanket and the primary aquifer to form a blocker; and proceeding with construction and forming a continuous retaining dam.

Method for constructing dam inside dump of inner-dump strip mine

Provided herein is a method for constructing a pumping-injection well of a groundwater reservoir in a dump of an open-pit mine. The pumping-injection well includes a bottom pipe, intermediate pipes, and a top pipe in sequence from bottom to top connected from bottom to top. The method includes: arranging a rubble barrier around the pumping-injection well, and installing the bottom pipe of the pumping-injection well at a designed position of the pumping-injection well as a center of circle; continuing to install an intermediate pipe on the bottom pipe, and pile up a rubble pile; continuing to stack multiple intermediate pipes, and starting the construction of the groundwater reservoir; discarding discarded materials from the open-pit mine to form a dump; continuing to stack intermediate pipes to build an inverted trapezoidal surface sump around the pumping-injection well; and installing the top pipe and a well cover to form a complete pumping-injection well.

Method for constructing pumping-injection well of groundwater reservoir in dump of open-pit mine

The present disclosure provides an artificial dam of a distributed coal mine underground reservoir and its constructing method. The artificial dam comprises a support layer (), an anti-seepage layer (), and a concrete structure layer () that are successively formed in an auxiliary roadway () from inside to outside, the concrete structure layer () being embedded into a security coal pillar () and/or surrounding rock () around the auxiliary roadway (). Because the concrete structure layer () is embedded into the security coal pillar () and/or the surrounding rock () around the auxiliary roadway (), the artificial dam is combined to the security coal pillar () to together form a dam for an underground reservoir. Due to multi-layer design, anti-seepage performance and structural strength of the dam can meet the water storage requirements of the underground reservoir.

Artificial dam of distributed coal mine underground reservoir and its constructing method

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Beijing, China

Quansheng Li