bar3D无法堆叠echarts geo3D配置项内容和展示

stack属性无效，不知道什么问题

      $.get("/asset/get/s/data-1526657336393-SJeHWOh0f.json", function (chinaJson) {
    console.log(chinaJson);
    echarts.registerMap('gz', chinaJson);
    myChart.setOption({
        geo3D: {
            map: 'gz'
        },
        series: [{
			name: 'd',
			stack: 'stack',
			type: "bar3D",
			coordinateSystem: 'geo3D',
			barSize: 1, //柱子粗细
			shading: 'lambert',
			itemStyle: {
				color: 'green'
			},
			data: [[113.32581312855118, 23.073012921875055, 69.64698590494164],[113.39535796657987, 22.93040997591149, 58.76292130111391],[113.34510124800715, 23.289560623963677, 88.92349883920589],[113.67181001079369, 23.689410819695752, 36.466276264960065],[113.17845198242195, 23.427770783203158, 106.47197019770212],[113.22685702392587, 23.107748334472703, 76.9508264655734],[113.49755165486663, 23.212754285400425, 22.50966927131966],[113.56496593680254, 22.72056201157928, 137.34845979456065],[113.36163098504328, 23.15430159888982, 217.43927979432513],[113.26713104403409, 23.134129088423325, 48.146224545295695],[113.75303103515635, 23.31861337931747, 115.86647882623214]]
		},
		{
			name: 'x',
			stack: 'stack',
			type: "bar3D",
			coordinateSystem: 'geo3D',
			barSize: 1, //柱子粗细
			shading: 'lambert',
			itemStyle: {
				color: 'red'
			},
			data: [[113.32581312855118, 23.073012921875055, 39.64698590494164],[113.39535796657987, 22.93040997591149, 28.76292130111391],[113.34510124800715, 23.289560623963677, 88.92349883920589],[113.67181001079369, 23.689410819695752, 36.466276264960065],[113.17845198242195, 23.427770783203158, 106.47197019770212],[113.22685702392587, 23.107748334472703, 76.9508264655734],[113.49755165486663, 23.212754285400425, 22.50966927131966],[113.56496593680254, 22.72056201157928, 137.34845979456065],[113.36163098504328, 23.15430159888982, 217.43927979432513],[113.26713104403409, 23.134129088423325, 48.146224545295695],[113.75303103515635, 23.31861337931747, 115.86647882623214]]
		}]
    })
});