针对敏东一矿低变质老年褐煤低温氧化造成综放工作面回风隅角CO超限问题,通过分析I0116300综放工作面回风隅角CO来源,提出了以有害气体抽采为主,以帷幕注氮、气幕稀释、喷洒阻化剂、均压通风等为辅的综合防治技术措施,并进行了现场应用...针对敏东一矿低变质老年褐煤低温氧化造成综放工作面回风隅角CO超限问题,通过分析I0116300综放工作面回风隅角CO来源,提出了以有害气体抽采为主,以帷幕注氮、气幕稀释、喷洒阻化剂、均压通风等为辅的综合防治技术措施,并进行了现场应用。研究结果表明:I0116300综放工作面回风隅角埋管进行CO等有害气体控制抽采,有效降低了隅角及回风CO浓度;采空区帷幕注氮,惰化遗煤氧化,可以有效抑制CO的生成量;局部均压通风和上隅角导风对抑制采空区CO涌出有较好的效果,工作面最佳配风量控制在1350 m 3/min左右并适当提高上隅角风压,有效减少了采空区CO涌出。通过现场应用,消除了I0116300综放工作面回风隅角CO超限隐患,为回采工作面的安全生产提供了保障。展开更多
With the increase of mining depth, more and deeper coal mines are limited by heat disaster. The cooling energy in deep mine cooling system comes from mine water inrush or ground cooling tower, but we cannot adopt the ...With the increase of mining depth, more and deeper coal mines are limited by heat disaster. The cooling energy in deep mine cooling system comes from mine water inrush or ground cooling tower, but we cannot adopt the two methods because mine water inrush in many old coal mines in China is limited. What is more, the cooling pipelines cannot be put in narrow pit-shaft. To settle the problem above, according to the characteristics of Zhangxiaolou Coal Mine, this paper adopts the deep mine return air as the cooling energy for deep mine cooling system. In addition, we carried out cite test to extract cold energy from return air. Through monitoring the water quantity, water temperature of cooling system and air temperature, we got the thermodynamic equilibrium parameters during the cooling energy acquisition analysis and the effect of cooling system that the temperature and humidity on working face are respectively reduced to 8-12 ℃ and 8-15% through cooling. This research offers experimental reference for deep mine cooling which lacks cooling energy.展开更多
本文提出了一种新型高带宽密度、低功耗的面向片上(Die to Die,D2D)互连的7阶相关非归零(Non-Return-to-Zero,NRZ)编码接口电路结构.为了进一步提高5阶相关NRZ编码在D2D互连中的信噪比和带宽密度,设计了基于发射矩阵和接收矩阵的编解码...本文提出了一种新型高带宽密度、低功耗的面向片上(Die to Die,D2D)互连的7阶相关非归零(Non-Return-to-Zero,NRZ)编码接口电路结构.为了进一步提高5阶相关NRZ编码在D2D互连中的信噪比和带宽密度,设计了基于发射矩阵和接收矩阵的编解码电路.基于发射矩阵,在发射端设计了基于电压模驱动的编码电路,有效降低了功耗;基于接收矩阵,在接收端设计了基于有源可调电感的解码均衡电路,提高了通信速率.同时,为了解决接收端时钟偏斜问题,还设计了误码校准电路.该接口电路采用28 nm CMOS(Complementary Metal Oxide Semiconductor)工艺设计,核心面积为3 mm^(2),可适用于10~50 mm的片上互连.后端仿真结果表明,在奈奎斯特频率为20 GHz、信道插损为-8 d B的条件下,接收端最窄眼宽为0.45 UI,误码率小于10^(-15),能耗效率为1.2 p J/b,带宽密度为448 Gbps/mm.展开更多
文摘针对敏东一矿低变质老年褐煤低温氧化造成综放工作面回风隅角CO超限问题,通过分析I0116300综放工作面回风隅角CO来源,提出了以有害气体抽采为主,以帷幕注氮、气幕稀释、喷洒阻化剂、均压通风等为辅的综合防治技术措施,并进行了现场应用。研究结果表明:I0116300综放工作面回风隅角埋管进行CO等有害气体控制抽采,有效降低了隅角及回风CO浓度;采空区帷幕注氮,惰化遗煤氧化,可以有效抑制CO的生成量;局部均压通风和上隅角导风对抑制采空区CO涌出有较好的效果,工作面最佳配风量控制在1350 m 3/min左右并适当提高上隅角风压,有效减少了采空区CO涌出。通过现场应用,消除了I0116300综放工作面回风隅角CO超限隐患,为回采工作面的安全生产提供了保障。
基金Financial supports for this project, provided by the key program supported by the National Natural Science Foundation of China(No. 51134005)the Doctoral Scientific Fund Project of the Ministry of Education of China (No. 20120023120004), are gratefully acknowledged
文摘With the increase of mining depth, more and deeper coal mines are limited by heat disaster. The cooling energy in deep mine cooling system comes from mine water inrush or ground cooling tower, but we cannot adopt the two methods because mine water inrush in many old coal mines in China is limited. What is more, the cooling pipelines cannot be put in narrow pit-shaft. To settle the problem above, according to the characteristics of Zhangxiaolou Coal Mine, this paper adopts the deep mine return air as the cooling energy for deep mine cooling system. In addition, we carried out cite test to extract cold energy from return air. Through monitoring the water quantity, water temperature of cooling system and air temperature, we got the thermodynamic equilibrium parameters during the cooling energy acquisition analysis and the effect of cooling system that the temperature and humidity on working face are respectively reduced to 8-12 ℃ and 8-15% through cooling. This research offers experimental reference for deep mine cooling which lacks cooling energy.
文摘本文提出了一种新型高带宽密度、低功耗的面向片上(Die to Die,D2D)互连的7阶相关非归零(Non-Return-to-Zero,NRZ)编码接口电路结构.为了进一步提高5阶相关NRZ编码在D2D互连中的信噪比和带宽密度,设计了基于发射矩阵和接收矩阵的编解码电路.基于发射矩阵,在发射端设计了基于电压模驱动的编码电路,有效降低了功耗;基于接收矩阵,在接收端设计了基于有源可调电感的解码均衡电路,提高了通信速率.同时,为了解决接收端时钟偏斜问题,还设计了误码校准电路.该接口电路采用28 nm CMOS(Complementary Metal Oxide Semiconductor)工艺设计,核心面积为3 mm^(2),可适用于10~50 mm的片上互连.后端仿真结果表明,在奈奎斯特频率为20 GHz、信道插损为-8 d B的条件下,接收端最窄眼宽为0.45 UI,误码率小于10^(-15),能耗效率为1.2 p J/b,带宽密度为448 Gbps/mm.
