Monitoring method for early spontaneous combustion of coal bed by radon measurement technique

Monitoring method for early spontaneous combustion of coal bed by radon measurement technique

  • CN 102,982,648 A
  • Filed: 10/04/2009
  • Published: 03/20/2013
  • Est. Priority Date: 10/04/2009
  • Status: Active Application
First Claim
Patent Images

1. a spontaneous fire in early stage of coal bed by radon measuring method monitoring method is characterized in that, will survey the radon method and be applied to colliery spontaneous fire in early stage of coal bed monitoring, is finished by following steps:

  • The first step, the ground configuration measuring point is seen dashed rectangle (100)101, select the spontaneous fire monitored areaIn Period of Coal Seam Spontaneous Combustion tendentiousness qualification result is the coal mine field with "nine squares" scope of spontaneous combustion or easily spontaneous combustion, choose a spontaneous fire monitored area;

    102, arrange a survey reference point in the monitored areaIn above-mentioned zone border and zone, arrange some surveys reference point;

    103, arrange measuring point by surveying a reference pointA reference point is generally four measuring points, is shaped as rectangle, square or irregular square grid, and the grid length of side is generally 200m * 200m;

    104, determine whether to strengthen monitored densityMonitoring mine spontaneous fire tendentiousness grade is spontaneous combustion or easily spontaneous combustion, but the spontaneous fire phenomenon never occured for this mine and peripheral ore deposit, and the normal arrangement measuring point forwards 206 to;

    Otherwise, forward 105 to;

    105, strengthen site densityIn observation process, according to ocurrence of coal seam situation, pit mining situation and monitoring situation, reference point further extends, and namely dwindles the square grid grid length of side to 100 m or 50 m or 20 m, strengthens monitored density;

    Second step extracts field data, sees dashed rectangle (200)206, measuring point numbering and layout instrument for measuring radonAll measuring points of all reference points are numbered, arrange instrument for measuring radon at each measuring point, prepare to carry out radon gas gas sample or collecting sensor signal, extract field data;

    207, judge the instrument for measuring radon kindJudging that what kind instrument for measuring radon is, is to survey radon sensor or radon gas α

    spy cup;

    If survey the radon sensor, forward 208 to;

    If radon gas α

    visits cup, forward 209 to;

    208, obtain open-air electric pulse transducing signalObtain the electric impulse signal of radon and daughter thereof by surveying the radon sensor, forward 310 to;

    209, radon gas α

    spy cup carries out gas sampleNeed manually once a day, at the underground 30-50cm of each measuring point place, bury radon gas α

    underground and visit cup, after 4 hours, and radon gas α

    is visited cup take out, forward 311 to;

    In the 3rd step, dashed rectangle (300) is seen in Computer Analysis310, each is surveyed radon sensor and links to each other with outstation, and the outstation that links to each other with four or six survey radon sensors links to each other with transmission interface, and transmission interface links to each other with supervisory control comuter, forwards 312 to;

    311, take out radon gas α and

    visit cup, insert immediately CD-1 α

    spy cup measuring instrument and measure, write down simultaneously and measure the regularly field survey data of 3min, forward 313 to;

    312, supervisory control comuter draws spontaneous fire of mine monitoring conclusion;

    313, the field survey data are inputed to computing machine and " survey radon and visit fiery data handling system ", draw spontaneous fire of mine monitoring conclusion.

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